Package: ngspice Version: 44.2+ds-1 When i interactively issue a tf command and use a capitalised nodename, ngspice crashes : ngspice 67 -> tf v(Out,0) vin Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
Internal Error: incomplete CKTunsetup(), this will cause serious problems, please report this issue ! ERROR: fatal error in ngspice, exit(1) --- When same command is issued without capitalisation , it works : siward@pc mailto:siward@pc:Spice$ ngspice try5 ****** ** ngspice-44.2 : Circuit level simulation program ** Compiled with KLU Direct Linear Solver ** The U. C. Berkeley CAD Group ** Copyright 1985-1994, Regents of the University of California. ** Copyright 2001-2024, The ngspice team. ** Please get your ngspice manual from https://ngspice.sourceforge.io/docs.html ** Please file your bug-reports at http://ngspice.sourceforge.net/bugrep.html ** Creation Date: Sun Jan 12 08:19:15 UTC 2025 ****** Note: Compatibility modes selected: ps lt a Circuit: * try5 : an rlc circuit ngspice 64 -> tf v(out,0) vin Doing analysis at TEMP = 27.000000 and TNOM = 27.000000 Using SPARSE 1.3 as Direct Linear Solver Note: vin: dc value used for op instead of transient time=0 value. No. of Data Rows : 1 --- I have tried this with that nodename in netlist file as "Out" and also as "out", in both cases behaviour is same . --- netlist file is : * try5 : an RLC circuit Vin in 0 dc 1 ac 1 pulse( 0 1 0 0 0 5 10) R1 in rl 0.5 L1 rl Out 1 C1 Out co 1 Vco co 0 0 .end * op * print all * ac dec 100 0.01 1 * plot real(out) im(out) mag(out) * plot db(out) * plot mag(out) mag( i(Vco) ) ** that does not plot if nodenames are numeric , but it does if they are strings ** it only plots these if plot command is after ac command , ** if i do pz command inbetween then it forgets ac values . ** "plot out" plots real part of voltage on out node . * pz 1 0 out 0 vol pz * print all ** that finds two poles , both at frequency 0.35 ** peak output is at 0.2 Hz * tran 0.01 10 * plot in out ** works * tf v(out,0) Vin ** error * tf v(out,0) vin ** * ngspice 16 -> tf v(out,0) vin * Doing analysis at TEMP = 27.000000 and TNOM = 27.000000 * Using SPARSE 1.3 as Direct Linear Solver * Note: vin: dc value used for op instead of transient time=0 value. * No. of Data Rows : 1 * ngspice 17 -> print all * transfer_function = 1.000000e+00 * output_impedance_at_v(out,0) = 5.000000e-01 * vin#input_impedance = 1.000000e+20 --- I am using Debian stable , which i think is uptodate . --- ngspice 65 -> sysinfo OS: Linux version 6.12.48+deb13-amd64 ([email protected]) (x86_64-linux-gnu-gcc-1 4 (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC Deb ian 6.12.48-1 (2025-09-20) CPU: Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz Physical processors: 1, Logical processors: 8 Total DRAM available = 7821.687500 MB. DRAM currently available = 550.152344 MB. --- Seems to me that this bug is related to uppercase/lowercase something, that is to say : i really don't know much about spice , but it told me to report this , so i hope it helps . Should you require me to run any testcode , or provide some other info , please send me an email . with friendly greetings, Siward de Groot
